debug/test_level_builder.gd

@@ -293,25 +293,40 @@ func _spawn_player(pid: int) -> CharacterBody3D:
 	# Use a slightly random spawn position to avoid exact overlapping
 	player.position = Vector3(randf_range(-2, 2), 2.0, randf_range(-2, 2))
 	
-	# Network Synchronizer
-	var sync = MultiplayerSynchronizer.new()
-	sync.name = "MultiplayerSynchronizer"
-	sync.set_multiplayer_authority(pid)
-	var rep_config = SceneReplicationConfig.new()
-	rep_config.add_property(":position")
-	rep_config.add_property(":rotation")
-	rep_config.add_property("HeadPivot:rotation")
-	rep_config.add_property(":synced_movement_state")
-	rep_config.add_property(":synced_movement_speed")
-	rep_config.add_property(":synced_is_crouching")
-	rep_config.add_property(":synced_weapon_path")
-	rep_config.add_property(":synced_loadout_p1")
-	rep_config.add_property(":synced_loadout_p2")
-	rep_config.add_property(":synced_loadout_sp")
-	rep_config.add_property(":synced_loadout_melee")
-	rep_config.add_property(":synced_loadout_ready")
-	sync.replication_config = rep_config
-	player.add_child(sync)
+	# Server Synchronizer (Host is the ground truth)
+	var server_sync = MultiplayerSynchronizer.new()
+	server_sync.name = "ServerSynchronizer"
+	server_sync.set_multiplayer_authority(1) # Host always controls these
+	var server_rep_config = SceneReplicationConfig.new()
+	server_rep_config.add_property(":position")
+	server_rep_config.add_property(":synced_movement_state")
+	server_rep_config.add_property(":synced_movement_speed")
+	server_rep_config.add_property(":synced_is_crouching")
+	server_rep_config.add_property(":health")
+	server_rep_config.add_property(":shield")
+	server_rep_config.add_property(":is_dead")
+	server_rep_config.add_property(":synced_grapple_point")
+	server_rep_config.add_property(":synced_is_grapple_shooting")
+	server_sync.replication_config = server_rep_config
+	player.add_child(server_sync)
+
+	# Client Synchronizer (Client dictates their aim and loadout setup)
+	var client_sync = MultiplayerSynchronizer.new()
+	client_sync.name = "MultiplayerSynchronizer" # Keep original name for compatibility if needed elsewhere
+	client_sync.set_multiplayer_authority(pid)
+	var client_rep_config = SceneReplicationConfig.new()
+	client_rep_config.add_property(":rotation")
+	client_rep_config.add_property("HeadPivot:rotation")
+	client_rep_config.add_property(":synced_weapon_path")
+	client_rep_config.add_property(":synced_loadout_p1")
+	client_rep_config.add_property(":synced_loadout_p2")
+	client_rep_config.add_property(":synced_loadout_sp")
+	client_rep_config.add_property(":synced_loadout_melee")
+	client_rep_config.add_property(":synced_loadout_ready")
+	client_rep_config.add_property(":synced_is_targeting")
+	client_rep_config.add_property(":synced_homing_target_pos")
+	client_sync.replication_config = client_rep_config
+	player.add_child(client_sync)
 
 	# Collision shape
 	var col_shape := CollisionShape3D.new()

movement/movement_state_machine.gd

@@ -64,6 +64,8 @@ func _ready() -> void:
 
 
 func _physics_process(delta: float) -> void:
+	if player and not player.multiplayer.is_server(): return
+
 	# Update coyote time
 	if on_ground:
 		coyote_timer = params.coyote_time

movement/player_movement_controller.gd

@@ -54,7 +54,13 @@ var grapple_rope: MeshInstance3D
 var synced_movement_state: String = "idle"
 var synced_movement_speed: float = 0.0
 var synced_is_crouching: bool = false
-var synced_weapon_path: String = ""
+@export var synced_weapon_path: String = ""
+@export var synced_grapple_point: Vector3 = Vector3.ZERO
+@export var synced_is_grapple_shooting: bool = false
+
+# For homing rocket
+@export var synced_is_targeting: bool = false
+@export var synced_homing_target_pos: Vector3 = Vector3.ZERO
 
 var synced_loadout_p1: String = ""
 var synced_loadout_p2: String = ""
@@ -315,7 +321,17 @@ func _spawn_remote_tracer(origin: Vector3, target: Vector3) -> void:
 		tracer.look_at(target, up_vec)
 
 func _spawn_remote_projectile(origin: Vector3, fire_dir: Vector3, weapon_name: String) -> void:
-	# Spawn a visual-only projectile (no damage, just the mesh flying)
+	# Try to find the actual weapon to spawn its custom projectile so it looks identical!
+	if camera:
+		var wman = camera.get_node_or_null("WeaponManager")
+		if wman:
+			for w in wman.weapons.values():
+				if "weapon_name" in w and w.weapon_name == weapon_name:
+					if w.has_method("_spawn_custom_projectile"):
+						w._spawn_custom_projectile(origin, fire_dir)
+						return
+						
+	# Fallback if weapon not found (e.g. joined late and weapons didn't build yet)
 	var proj = Node3D.new()
 	proj.name = "RemoteProjectile"
 	
@@ -339,7 +355,7 @@ func _spawn_remote_projectile(origin: Vector3, fire_dir: Vector3, weapon_name: S
 		light.omni_range = 4.0
 		proj.add_child(light)
 	else:
-		# Rocket-shaped mesh (cone + cylinder)
+		# Generic rocket fallback
 		var mesh_inst = MeshInstance3D.new()
 		var p_mesh = CylinderMesh.new()
 		p_mesh.top_radius = 0.0
@@ -354,7 +370,6 @@ func _spawn_remote_projectile(origin: Vector3, fire_dir: Vector3, weapon_name: S
 		mesh_inst.rotation.x = deg_to_rad(-90)
 		proj.add_child(mesh_inst)
 		
-		# Smoke trail
 		var smoke = GPUParticles3D.new()
 		var smoke_mat = ParticleProcessMaterial.new()
 		smoke_mat.direction = Vector3(0, 0, 1)
@@ -468,7 +483,7 @@ func rpc_take_damage(amount: float, hit_pos: Vector3, attacker_id: int, weapon_n
 			health = 0.0
 			die(impulse)
 			
-			if is_multiplayer_authority():
+			if multiplayer.is_server():
 				if get_node_or_null("/root/NetworkManager") and multiplayer.has_multiplayer_peer():
 					var victim_id = multiplayer.get_unique_id()
 					var killer_id = attacker_id
@@ -512,68 +527,34 @@ func _ensure_machine() -> MovementStateMachine:
 	_machine = null
 	return null
 
+var _client_input_dir: Vector2 = Vector2.ZERO
+var _client_wish_dir_world: Vector3 = Vector3.ZERO
+var _client_jump: bool = false
+var _client_jump_just_pressed: bool = false
+var _client_crouch: bool = false
+var _client_dash: bool = false
+var _client_grapple: bool = false
+var _client_grapple_just_pressed: bool = false
+
+@rpc("any_peer", "call_local", "unreliable")
+func server_receive_inputs(input_dir: Vector2, wish_dir: Vector3, jump: bool, jump_just: bool, crouch: bool, dash: bool, grapple: bool, grapple_just: bool) -> void:
+	if not multiplayer.is_server(): return
+	var sender = multiplayer.get_remote_sender_id()
+	if sender != str(name).to_int() and sender != 1: return # Accept from owner or host self
+
+	_client_input_dir = input_dir
+	_client_wish_dir_world = wish_dir
+	_client_jump = jump
+	_client_jump_just_pressed = jump_just
+	_client_crouch = crouch
+	_client_dash = dash
+	_client_grapple = grapple
+	_client_grapple_just_pressed = grapple_just
+
 func _physics_process(_delta: float) -> void:
-	if not is_multiplayer_authority(): return
-	var speed = velocity.length()
-	var wind_factor = clampf((speed - 10.0) / 25.0, 0.0, 1.0)
-	# Decibel scale is non-linear, so lerping from -80 means it stays inaudible for a long time.
-	# -40 db is practically silent for a background loop, -15 db is our max quiet wind.
-	wind_player.volume_db = lerpf(-40.0, -15.0, wind_factor)
-	if not wind_player.playing and wind_factor > 0.0:
-		wind_player.play()
-
-	var sm := _ensure_machine()
-	if not sm:
-		return
-
-	# Poll input in _physics_process so it's synchronized with the state machine tick
-	sm.input_jump_just_pressed = Input.is_action_just_pressed("jump")
-	sm.input_jump_pressed = Input.is_action_pressed("jump")
-	sm.input_crouch = Input.is_action_pressed("crouch")
-	sm.input_dash = Input.is_action_just_pressed("dash")
-	
-	sm.input_grapple = Input.is_action_pressed("grapple")
-	sm.input_grapple_just_pressed = Input.is_action_just_pressed("grapple")
-
-	# Update grapple rope visuals
-	if (sm.current_state == "grapple" or sm.is_grapple_shooting) and camera:
-		grapple_rope.visible = true
-		
-		# For shoot, start at right side of camera slightly below and closer
-		var start_pos = camera.global_position + camera.global_transform.basis * Vector3(0.3, -0.3, -0.15)
-		var end_pos = sm.grapple_point
-		
-		if sm.is_grapple_shooting and sm.grapple_travel_time > 0.0:
-			# Interpolate end_pos
-			var t = clampf(sm.grapple_shoot_time / sm.grapple_travel_time, 0.0, 1.0)
-			end_pos = start_pos.lerp(sm.grapple_point, t)
-			
-		var dist = start_pos.distance_to(end_pos)
-		if dist > 0.01:
-			grapple_rope.global_position = (start_pos + end_pos) / 2.0
-			# Look at end point
-			var up_vec = Vector3.UP
-			var dir = (end_pos - start_pos).normalized()
-			if abs(dir.dot(up_vec)) > 0.99:
-				up_vec = Vector3.RIGHT
-			# Set rotation first, which resets scale
-			grapple_rope.transform.basis = Basis.looking_at(dir, up_vec) * Basis.from_euler(Vector3(PI/2.0, 0, 0))
-			# Then apply the scale
-			grapple_rope.scale = Vector3(1.0, dist, 1.0)
-	else:
-		if grapple_rope:
-			grapple_rope.visible = false
-			
-	# Swing sound
-	if sm.current_state == "grapple" and sm.player.velocity.length() > 5.0:
-		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -15.0, _delta * 10.0)
-	else:
-		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -80.0, _delta * 15.0)
-
-	# Raw 2D input
+	# Local client captures input and sends it
+	if is_multiplayer_authority():
 		var raw_input := Input.get_vector("move_left", "move_right", "move_forward", "move_back")
-
-	# Transform input direction by player yaw so movement is camera-relative
 		var forward := -global_transform.basis.z
 		forward.y = 0.0
 		forward = forward.normalized()
@@ -585,8 +566,70 @@ func _physics_process(_delta: float) -> void:
 		if world_dir.length_squared() > 1.0:
 			world_dir = world_dir.normalized()
 			
-	sm.input_dir = raw_input
-	sm.wish_dir_world = world_dir
+		var input_jump = Input.is_action_pressed("jump")
+		var input_jump_just = Input.is_action_just_pressed("jump")
+		var input_crouch = Input.is_action_pressed("crouch")
+		var input_dash = Input.is_action_just_pressed("dash")
+		var input_grapple = Input.is_action_pressed("grapple")
+		var input_grapple_just = Input.is_action_just_pressed("grapple")
+		
+		server_receive_inputs.rpc_id(1, raw_input, world_dir, input_jump, input_jump_just, input_crouch, input_dash, input_grapple, input_grapple_just)
+
+	var speed = velocity.length()
+	var wind_factor = clampf((speed - 10.0) / 25.0, 0.0, 1.0)
+	wind_player.volume_db = lerpf(-40.0, -15.0, wind_factor)
+	if not wind_player.playing and wind_factor > 0.0:
+		wind_player.play()
+
+	var sm := _ensure_machine()
+	if not sm:
+		return
+
+	# Only the Server sets input values to the StateMachine for evaluation
+	if multiplayer.is_server():
+		sm.input_dir = _client_input_dir
+		sm.wish_dir_world = _client_wish_dir_world
+		sm.input_jump_pressed = _client_jump
+		sm.input_jump_just_pressed = _client_jump_just_pressed
+		sm.input_crouch = _client_crouch
+		sm.input_dash = _client_dash
+		sm.input_grapple = _client_grapple
+		sm.input_grapple_just_pressed = _client_grapple_just_pressed
+		
+		# Reset one-frame actions
+		_client_jump_just_pressed = false
+		_client_dash = false
+		_client_grapple_just_pressed = false
+
+		# Update synced properties for the grapple
+		if sm.current_state == "grapple" or sm.is_grapple_shooting:
+			synced_grapple_point = sm.grapple_point
+			synced_is_grapple_shooting = sm.is_grapple_shooting
+
+	# Update grapple rope visuals (runs on all clients for smooth interpolation)
+	if (synced_movement_state == "grapple" or synced_is_grapple_shooting) and camera:
+		grapple_rope.visible = true
+		var start_pos = camera.global_position + camera.global_transform.basis * Vector3(0.3, -0.3, -0.15)
+		var end_pos = synced_grapple_point
+		var dist = start_pos.distance_to(end_pos)
+		if dist > 0.01:
+			grapple_rope.global_position = (start_pos + end_pos) / 2.0
+			var up_vec = Vector3.UP
+			var dir = (end_pos - start_pos).normalized()
+			if abs(dir.dot(up_vec)) > 0.99:
+				up_vec = Vector3.RIGHT
+			grapple_rope.transform.basis = Basis.looking_at(dir, up_vec) * Basis.from_euler(Vector3(PI/2.0, 0, 0))
+			grapple_rope.scale = Vector3(1.0, dist, 1.0)
+	else:
+		if grapple_rope:
+			grapple_rope.visible = false
+			
+	if synced_movement_state == "grapple" and velocity.length() > 5.0:
+		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -15.0, _delta * 10.0)
+	else:
+		grapple_swing_player.volume_db = lerpf(grapple_swing_player.volume_db, -80.0, _delta * 15.0)
+
+	# Update humanoid model animation state (runs everywhere)
 
 	# Update humanoid model animation state
 	var humanoid = get_node_or_null("HumanoidModel")
@@ -873,9 +916,11 @@ func _on_respawn_pressed() -> void:
 
 @rpc("any_peer", "call_local", "reliable")
 func rpc_respawn(spawn_pos: Vector3) -> void:
+	if is_dead:
 		is_dead = false
 		health = max_health
-	shield = 0.0
+		shield = max_shield
+		time_since_last_damage = 0.0
 		
 		if is_instance_valid(ragdoll_instance):
 			if ragdoll_instance.has_meta("spring_arm"):
@@ -884,6 +929,9 @@ func rpc_respawn(spawn_pos: Vector3) -> void:
 					sa.queue_free()
 			ragdoll_instance.queue_free()
 		
+		visible = true
+		process_mode = Node.PROCESS_MODE_INHERIT
+		
 		# Restore camera parent
 		if is_instance_valid(camera) and is_instance_valid(head_pivot):
 			var p = camera.get_parent()
@@ -906,11 +954,15 @@ func rpc_respawn(spawn_pos: Vector3) -> void:
 		if visual_model:
 			visual_model.visible = true
 
+	# Server sets the actual position to sync to everyone
+	if multiplayer.is_server() or not multiplayer.has_multiplayer_peer() or multiplayer.multiplayer_peer is OfflineMultiplayerPeer:
+		position = spawn_pos
+		velocity = Vector3.ZERO
+		
+	# Local client resets UI and rebuilds weapons for their view
 	if is_multiplayer_authority():
 		if death_screen:
 			death_screen.visible = false
-		position = spawn_pos
-		velocity = Vector3.ZERO
 		
 		# Optional: reset weapons
 		var wman = camera.get_node_or_null("WeaponManager") if camera else null

weapons/explosive_projectile.gd

@@ -137,7 +137,7 @@ func _on_hit(result: Dictionary) -> void:
 	if not result.collider.has_method("take_damage"):
 		if result.collider is StaticBody3D or result.collider is CSGShape3D:
 			ImpactSpawner.spawn(get_tree(), "crater", result.position, result.normal, explosion_radius * 1.5)
-	elif not owner_player or owner_player.is_multiplayer_authority():
+	elif owner_player and owner_player.multiplayer.is_server():
 		result.collider.take_damage(damage, result.position, owner_player)
 	_explode(result.position)
 	destroy()
@@ -200,11 +200,11 @@ func _explode(pos: Vector3) -> void:
 			if col == owner_player and not can_self_damage:
 				# Skip self damage, but we still applied the knockback!
 				pass
-			elif not owner_player or owner_player.is_multiplayer_authority():
+			elif owner_player and owner_player.multiplayer.is_server():
 				col.take_damage(final_damage, target_pos, owner_player, dir * final_knockback)
 				
 	# Broadcast Visual Explosion Effect to other peers
-	if owner_player and owner_player.has_method("server_play_explosion") and owner_player.multiplayer.has_multiplayer_peer() and owner_player.multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
+	if owner_player and owner_player.is_multiplayer_authority() and owner_player.has_method("server_play_explosion") and owner_player.multiplayer.has_multiplayer_peer() and owner_player.multiplayer.multiplayer_peer is not OfflineMultiplayerPeer:
 		owner_player.server_play_explosion.rpc_id(1, pos, explosion_radius)
 		
 	# Local Visual Effect

weapons/homing_projectile.gd

@@ -102,11 +102,18 @@ func _physics_process(delta: float) -> void:
 			
 	if ignited and is_instance_valid(weapon_source):
 		var target_dir: Vector3 = initial_aim_dir
-		var is_painting = weapon_source.get("is_targeting")
+		var is_painting = false
+		var target: Vector3 = Vector3.ZERO
 		
+		if weapon_source.get("player") and weapon_source.player:
+			is_painting = weapon_source.player.synced_is_targeting
+			target = weapon_source.player.synced_homing_target_pos
+		else:
+			is_painting = weapon_source.get("is_targeting")
 			if is_painting != null and is_painting:
-			var target: Vector3 = weapon_source.get("homing_target_pos")
-			if target != null and target != Vector3.ZERO:
+				target = weapon_source.get("homing_target_pos")
+		
+		if is_painting and target != Vector3.ZERO:
 			target_dir = (target - global_position).normalized()
 				
 		if target_dir != Vector3.ZERO:

weapons/projectile.gd

@@ -58,7 +58,7 @@ func _on_hit(result: Dictionary) -> void:
 		final_damage = lerpf(damage, min_damage, falloff_factor)
 		
 	if result.collider.has_method("take_damage"):
-		if not owner_player or owner_player.is_multiplayer_authority():
+		if owner_player and owner_player.multiplayer.is_server():
 			result.collider.take_damage(final_damage, result.position, owner_player)
 	elif result.collider is StaticBody3D or result.collider is CSGShape3D:
 		var size = 0.4 if impact_type == "plasma" else 0.15

weapons/rocket_swarm.gd

@@ -91,9 +91,18 @@ func _process(delta: float) -> void:
 				(targeting_laser.mesh as CylinderMesh).height = 300.0
 				targeting_laser.position.z = -150.0
 				
+			if player and player.is_multiplayer_authority():
+				player.synced_is_targeting = true
+				player.synced_homing_target_pos = homing_target_pos
+		else:
+			if player and player.is_multiplayer_authority():
+				player.synced_is_targeting = false
+
 func unequip() -> void:
 	is_targeting = false
 	targeting_laser.visible = false
+	if player and player.is_multiplayer_authority():
+		player.synced_is_targeting = false
 
 # Override fire to shoot 8 rockets at once
 func _fire() -> void: